<template>
  <div>
    <h2 ref="title">哈哈哈</h2>
  </div>
</template>

<script>
import { ref, watchEffect } from "vue";

export default {
  setup() {
    const title = ref(null);

    watchEffect(
      () => {
        console.log(title.value);
      },
      { flush: "post" }
    );
    
    return { title };
  },
};
</script>

<style scoped></style>
